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Laser-diode-pumped, erbium-doped, solid-state laser with high slope efficiency

Patent ·
OSTI ID:6970606
; ;
A laser and method for producing a laser emission at a wavelength of substantially 2.8 microns is disclosed. In a preferred embodiment of the invention, the laser comprises laser diode means for emitting a pump beam at a preselected wavelength; and a crystal having a preselected host material doped with a predetermined percent concentration of erbium activator ions sufficient to produce a laser emission at substantially 2.8 microns at a slope efficiency of at least 5 percent, but preferrably 10 percent, when the crystal is pumped by the pump beam. It is well known that the human body is comprised of approximately 70% water, with various human tissues containing about 60% to 90% of water, and bone and cartilage containing about 30% to 40% of water. Since the 2.8 micron wavelength has a substantially maximum absorption in water, this 2.8 micron wavelength is the ideal wavelength to use for a large variety of medical laser applications on the human body. A 2.8 micron wavelength laser could be used for precise surgery in such exemplary applications as brain surgery, neurosurgery, eye surgery, plastic surgery, burn treatment and the removal of malignancies.
Research Organization:
Department of the Navy, Washington, DC (USA)
Assignee:
Department of the Navy, Washington, DC (US)
Patent Number(s):
A US 7-429426
OSTI ID:
6970606
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
ABSORPTION
ANIMAL TISSUES
BODY
BRAIN
CARTILAGE
CENTRAL NERVOUS SYSTEM
CHARGED PARTICLES
CONNECTIVE TISSUE
DESIGN
DISEASES
DOPED MATERIALS
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ERBIUM
HUMAN POPULATIONS
INFRARED RADIATION
IONS
LASERS
MATERIALS
MEDICINE
METALS
NEOPLASMS
NERVOUS SYSTEM
OPTICAL PUMPING
ORGANS
PLASTIC SURGERY
POPULATIONS
PUMPING
RADIATIONS
RARE EARTHS
REMOVAL
SOLID STATE LASERS
SURGERY
TISSUES
USES